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A032497
Numbers n such that 241*2^n+1 is prime.
1
36, 72, 288, 5528, 8904, 9876, 130992
OFFSET
1,1
PROG
(PARI) is(n)=ispseudoprime(241*2^n+1) \\ Charles R Greathouse IV, Jun 07 2017
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
EXTENSIONS
One more term (from the Ballinger-Keller web page) from M. F. Hasler, Apr 18 2007
STATUS
approved